Among the biggest gainers was Staar Surgical Co., jumping 19 percent to $6.41. The Monrovia maker of implantable lenses to correct vision forecast first quarter revenue growth that was better than Wall Street expected.

Among the largest decliners was Cere Inc., down 14 percent to $3.03. The Thousand Oaks developer of genetically modified feedstocks for renewable energy production reported a disappointing fiscal second quarter.

Tetra Tech Inc, fell 11.5 percent to $25.45. The Pasadena engineering and technical service firm gave lower revenue projections for the second half of the year.